EP2463918A1 - Solarzellenmodul - Google Patents

Solarzellenmodul Download PDF

Info

Publication number
EP2463918A1
EP2463918A1 EP10806482A EP10806482A EP2463918A1 EP 2463918 A1 EP2463918 A1 EP 2463918A1 EP 10806482 A EP10806482 A EP 10806482A EP 10806482 A EP10806482 A EP 10806482A EP 2463918 A1 EP2463918 A1 EP 2463918A1
Authority
EP
European Patent Office
Prior art keywords
solar cell
lead wires
cell module
electrodes
insulating substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10806482A
Other languages
English (en)
French (fr)
Inventor
Akira Shimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of EP2463918A1 publication Critical patent/EP2463918A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H01L31/02013—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising output lead wires elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
    • H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
    • H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
    • H01L31/0465—PV modules composed of a plurality of thin film solar cells deposited on the same substrate comprising particular structures for the electrical interconnection of adjacent PV cells in the module
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention relates to a solar cell module in which lead wires are drawn out from end electrodes provided to both ends of a plurality of solar cells that are formed on an insulating substrate and connected in series.
  • a so-called thin-film solar cell which is a type of solar cell that has a structure in which a thin layer of silicon is deposited on a light-transmitting insulating substrate, such as a glass substrate, requires the use of far less silicon than a crystalline solar cell, and the production process is also simpler, so the cost is lower, and because of this such solar cells have been in the spotlight of late.
  • FIG. 14 is a plan view of the solar cell module 100A as seen from the rear.
  • FIG. 15 is a cross section along the E-E line in FIG. 14 .
  • FIG. 16 is a detailed enlargement of the Z portion in FIG. 15 .
  • the solar cell module is displayed with the front and back reversed upside-down from the normal display. That is, the top in the drawings is the back side of the solar cell module, and the bottom is the front side.
  • the above-mentioned solar cell module 100A is configured such that a plurality of serially connected solar cells 3 are formed on a glass substrate 2 (a light-transmitting insulating substrate), a resin filling layer 4 is formed on these solar cells 3, and a back sheet layer 5 is formed over the resin filling layer 4.
  • each of the solar cells 3 has a transparent conductive film layer 11, an amorphous semiconductor layer 12 made from silicon, and a rear metal layer 13 laminated in that order, in three layers, in rows, in the lengthwise direction of the solar cell module 100A, on the glass substrate 2.
  • the solar cells 3 that are each made up of these three layers (the transparent conductive film layer 11, the amorphous semiconductor layer 12, and the rear metal layer 13) are connected in series to each other as discussed above to form the solar cell module 100A.
  • the rear metal layer 13 of the solar cell 3 at the left end is connected to the transparent conductive film layer 11 of the adjacent solar cell 3 on the right side (which is adjacent to the left-end solar cell 3), and similarly, the rear metal layer 13 of the right-side adjacent solar cell 3 is connected to the transparent conductive film layer 11 of the adjacent solar cell 3 on its right side (which is adjacent to the right-side adjacent solar cell 3), and so on with the solar cells 3 being connected in series.
  • end electrodes 6 are formed in the lengthwise direction of the solar cell module 100A on the rear metal layer 13 of the left-end solar cell 3 connected to the transparent conductive film layer 11 of the adjacent solar cell 3 on the right side which is adjacent to the left-end solar cell 3, and on the rear metal layer 13 of the solar cell 3 at the right end.
  • lead wires 7 which are made of copper or aluminum foil, for example, are connected one each to these end electrodes 6. These lead wires 7 are drawn out in a straight line from the end electrodes 6, along the glass substrate 2 through the resin filling layer 4, and toward the center of the solar cell module 100A. These lead wires 7 curve in the back side direction of the glass substrate 2 at the center of the solar cell module 100A, that is, upward in FIG. 15 , and their distal ends protrude upward from the resin filling layer 4 and are accommodated in a terminal box 9. In the drawings referred to above, the shape inside the terminal box 9 is partially omitted.
  • the draw-out structure of the above-mentioned lead wires 7 is substantially the same as that in the cell module discussed in Patent Document 1 (see FIG. 6 in Patent Document 1). Specifically, the lead wires are drawn out in a straight line from the end electrodes, along the glass substrate, and toward the center of the cell module.
  • solar cell module 100B that is constituted the same as the above-mentioned solar cell module 100A. With this solar cell module 100B, as shown in FIG. 17 , the lead wires 7 are bonded with an adhesive agent to the back of the solar cells 3.
  • the lead wires 7 are drawn out in a straight line from end electrodes 6, along a glass substrate 2 through a resin filling layer 4, and toward the center of the solar cell module 100B.
  • the above-mentioned solar cell modules in which a plurality of solar cells comprising an amorphous semiconductor layer are connected in series and formed on a glass substrate that is a light-transmitting insulating substrate, are usually installed and used outdoors. Therefore, there is the risk of encountering the following problems under environments exposed to wind and rain or to temperature differentials.
  • the lead wires are drawn out in a straight line from the end electrodes, along the glass substrate, toward the center of the solar cell module.
  • the difference in the coefficients of thermal expansion between the glass substrate 2 and the lead wires 7 causes the lead wires 7 to shrink, placing stress on the proximal ends of the lead wires 7 connected to the end electrodes 6. As shown in FIG. 18 , this can cause the lead wires 7 to break at their proximal ends, creating breaks 10, or the end electrodes 6 may separate from the rear metal layer 13 of the solar cell 3.
  • the lead wires 7 will be pulled, which places stress on the proximal ends of the lead wires 7 connected to the end electrodes 6. Accordingly, as shown in FIG. 19 , there is the risk that the lead wires 7 will break at their proximal ends and create breaks 10, or that the end electrodes 6 will separate from the rear metal layer 13 of the solar cell 3.
  • the above-mentioned solar cell module 100B is exposed to low temperatures, for example, the difference in the coefficients of thermal expansion between the glass substrate 2 and the lead wires 7 causes the lead wires 7 to shrink, placing stress on the lead wires 7 that are bonded with an adhesive agent to back of the solar cell 3. Accordingly, as shown in FIG. 20 , this can cause the lead wires 7 to break in the middle and create breaks 10, or cause the solar cell 3 to separate from the glass substrate 2.
  • the lead wires 7 will be pulled, which places stress on the proximal ends of the lead wires 7 bonded with an adhesive agent to the back of the solar cell 3. Accordingly, as shown in FIG. 21 , there is the risk that the lead wires 7 will break in the middle and create breaks 10, or that the solar cell 3 will separate from the glass substrate 2.
  • the present invention provides a solar cell module in which solar cells are connected in series on a glass substrate that is a light-transmitting insulating substrate, wherein breakage of the lead wires of the solar cell module and other such problems can be prevented even under environments exposed to wind and rain or to temperature differentials.
  • the solar cell module of the present invention includes an insulating substrate, a plurality of solar cells that are formed in rows and disposed in parallel on the insulating substrate, extraction electrodes that are provided intermediate or at both ends of the serial connection, and lead wires that are connected at their proximal ends to the extraction electrodes, and are drawn out from the extraction electrodes along the insulating substrate, wherein the lead wires are formed in a mesh shape.
  • these lead wires are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires from breaking at their proximal ends, or the extraction electrodes from separating.
  • these lead wires are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires from breaking at their proximal ends, or the extraction electrodes from separating.
  • these lead wires are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires from breaking in the middle, or the solar cells from separating from the insulating substrate.
  • these lead wires are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires from breaking in the middle, or the solar cells from separating from the insulating substrate.
  • the curving of the lead wires may be such that they curve in the approximate thickness direction of the insulating substrate. Alternatively, they may curve in a direction that is approximately parallel to the insulating substrate.
  • the solar cell module of the present invention may include an insulating substrate, a plurality of solar cells that are formed in rows and disposed in parallel on the insulating substrate, and that are connected in series, extraction electrode that are provided intermediate or at both ends of the serial connection, and lead wires that are connected at their proximal ends to the extraction electrodes, and are drawn out from the extraction electrodes along the insulating substrate, wherein the lead wires are formed in a mesh shape consisting of a mesh of fine metal wires.
  • the lead wires formed in a mesh shape are stretchable as are the above-mentioned lead wires formed in a curved shape, so the same operation and effect are obtained as with the above-mentioned solar cell module in which the lead wires are formed in a curved shape.
  • a resin filling layer may be formed on the solar cells, and the above-mentioned lead wires embedded in this resin filling layer.
  • the lead wires embedded in this resin filling layer may be bonded on the solar cells. Doing this affords a stronger structure of the solar cell module.
  • the lead wires of the solar cell module are formed in a curved shape. Accordingly, if the solar cell module is exposed to low temperatures, the problems related to the lead wires can be prevented as discussed below. Specifically, even if a difference in the coefficients of thermal expansion between the insulating substrate and the lead wires should cause the lead wires to shrink, placing stress on the proximal ends of the lead wires connected to the extraction electrodes, these lead wires are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires from breaking at their proximal ends, or the extraction electrodes from separating.
  • FIG. 1 is a plan view of a solar cell module according to a first embodiment as seen from the back side.
  • FIG. 2 is a cross section along the A-A line in FIG. 1 .
  • FIG. 3 is a detailed enlargement of the X portion in FIG. 2 .
  • the solar cell module is shown with the front and back upside-down as compared to a normal display. That is, the top in the drawings is the back side of the solar cell module, and the bottom is the front side.
  • the solar cell module 1A according to the first embodiment has substantially the same structure as the solar cell module 100A in the conventional example given above. That is, in FIGS. 1 to 3 , the solar cell module 1A is constituted such that a plurality of solar cells 3 that are connected in series are formed on a glass substrate 2 that is a light-transmitting insulating substrate, a resin filling layer 4 is formed on these solar cells 3, and a back sheet layer 5 is formed over the resin filling layer 4.
  • the above-mentioned solar cell module 1A is similar to the conventional solar cell module 100A in that, as shown in FIG. 3 , the solar cells 3 each have a transparent conductive film layer 11, an amorphous semiconductor layer 12 made from silicon, and a rear metal layer 13 laminated in that order, in three layers, in rows, in the lengthwise direction of the solar cell module 1A, on the glass substrate 2.
  • the solar cells 3 that are each made up of these three layers (the transparent conductive film layer 11, the amorphous semiconductor layer 12, and the rear metal layer 13) are connected in series to each other as discussed above to form the solar cell module 1A.
  • the rear metal layer 13 of the solar cell 3 at the left end is connected to the transparent conductive film layer 11 of the adjacent solar cell 3 on the right side (which is adjacent to the left-end solar cell 3), and similarly, the rear metal layer 13 of the right-side adjacent solar cell 3 is connected to the transparent conductive film layer 11 of the adjacent solar cell 3 on its right side (which is adjacent to the right-side adjacent solar cell 3), and so on with the solar cells 3 being connected in series.
  • end electrodes 6 are formed in the lengthwise direction of the solar cell module 1A on the rear metal layer 13 of the left-end solar cell 3 connected to the transparent conductive film layer 11 of the adjacent solar cell 3 on the right side which is adjacent to the left-end solar cell 3, and on the rear metal layer 13 of the solar cell 3 at the right end. These end electrodes 6 correspond to the extraction electrodes mentioned above.
  • lead wires 7, which are made of copper or aluminum foil, for example, are connected one each to these end electrodes 6. These lead wires 7 are drawn out from the end electrodes 6, along the glass substrate 2 through the resin filling layer 4, and toward the center of the cell module 1A.
  • These lead wires 7 curve in the back side direction of the glass substrate 2 at the center of the cell module 1A (that is, they bend upward in FIG. 15 , so the back side direction of the glass substrate 2 will hereinafter be called “upward,” and the front side direction of the glass substrate 2 will be called “downward"), and their distal ends protrude upward from the resin filling layer 4 and are accommodated in a terminal box 9.
  • the shape inside the terminal box 9 is partially omitted.
  • the solar cell module 1A of the first embodiment differs from the conventional solar cell module 100A discussed above in the following respect. With the solar cell module 100A, in FIGS. 15 and 16 , the lead wires 7 that are drawn out from the end electrodes 6, along the glass substrate 2 through the resin filling layer 4, and toward the center of the cell module 100A are straight.
  • the lead wires 7 that are drawn out from the end electrodes 6, along the glass substrate 2 through the resin filling layer 4, and toward the center of the cell module 1A are formed with continuous undulatations so that they curve in the thickness direction of the glass substrate 2 (that is, in FIG. 2 , they are curved in the up-and-down direction, and the thickness direction of the glass substrate 2 will hereinafter be referred to simply as the up-and-down direction).
  • the solar cell module 1A of the above-mentioned first embodiment has the following operation and effect.
  • problems related to the lead wires 7 can be prevented as follows.
  • the lead wires 7 are stretchable because they are formed in a curved shape as discussed above, which prevents the lead wires 7 from breaking at their proximal ends, or the end electrodes 6 from separating from the rear metal layer 13 of the solar cells 3.
  • the problems related to the lead wires 7 can be prevented in the same way as above.
  • these lead wires 7 are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires 7 from breaking at their proximal ends, or the end electrodes 6 from separating from the rear metal layer 13 of the solar cells 3.
  • the lead wires 7 that are drawn out from the end electrodes 6, along the glass substrate 2 through the resin filling layer 4, and toward the center of the solar cell module 1A are formed in a shape that continuously undulates in the up-and-down direction from the end electrodes 6 all the way to the part that bends upward.
  • the curved shape of the lead wires 7 is not limited to this, and any shape may be used so long as it affords the lead wires 7 stretchability.
  • FIGS. 4(a) to 4(d) and FIGS. 5(a) and 5(b) show other examples of the curved shape of the lead wires 7.
  • FIGS. 4(a) to 4(d) are cross sections of other examples of the lead wires 7 whose curved shape curves in the up-and-down direction, just as in the above description.
  • FIG. 4(a) is an example in which the shape of the lead wires 7 undulates in the up-and-down direction over part of the section going from the end electrodes 6 to the part that bends upward. Since this undulating shape curves up and down within the rear face sealing material of the module, the up and down height of the curved part is preferably less than or equal to the total thickness of the sealing material.
  • the up and down height of the undulations is preferably 0.8 mm or less.
  • this undulating portion does not have to be made over the entire length of the lead wires, and just the required amount of deformation may be used, taking into account mechanical deformation and deformation due to temperature.
  • d1 be the amount of deformation due to temperature
  • d2 be the amount of mechanical deformation
  • L1 be the total length of the lead wires in their curved state
  • L2 be the total length of the lead wires when they have been stretched out straight
  • the amount of deformation due to temperature d1 is calculated by setting the lowest anticipated temperature and the temperature coefficient of glass and copper, which gives us d1 ⁇ 1.3 mm
  • the amount of mechanical deformation d2 is calculated by setting the anticipated radius of curvature of the glass, which gives us d2 ⁇ 0.2 mm
  • the undulations in this case, if we assume that the undulation period is 2.0 mm, the undulation height in the up-and-down direction is 0.4 mm, and the external shape of the undulations is a sine curve, these conditions are satisfied if undulations are provided along a width of at least 18 mm of the 870 mm length of the lead wires.
  • the lead wires are stamped with undulations of 50 mm from a safety perspective.
  • FIG. 4(b) is an example in which upwardly convex undulations are formed non-continuously over the part of the lead wires 7 going from the end electrodes 6 to the portion that bends upward.
  • FIG. 4(c) is an example in which downwardly convex undulations are formed non-continuously over the part of the lead wires 7 going from the end electrodes 6 to the portion that bends upward.
  • the required undulation conditions are the same as in FIG. 4(a) , and if, for example, 50 convex or concave shapes with a width of 1.0 mm and a height or depth of 0.2 mm are provided at a spacing of 15.0 mm, about the same amount of elongation as in the example in FIG. 4(a) can be dispersed over a wider range over the entire lead wires.
  • FIG. 4(d) is an example in which triangular undulations that are bent in the up-and-down direction are formed continuously over the part of the lead wires 7 going from the end electrodes 6 to the portion that bends upward.
  • the undulations may be formed as shown in FIGS. 4(a) to 4(c) above.
  • FIGS. 5(a) and 5(b) show plan views of examples of the lead wires 7 in which the curved shape curves in a direction that is substantially parallel to the glass substrate 2.
  • FIG. 5(a) is an example in which undulations that curve in a direction substantially parallel to the glass substrate 2 are formed continuously over the part of the lead wires 7 going from the end electrodes 6 to the portion that bends upward.
  • FIG. 5(b) is an example in which triangular undulations that are bent in a direction substantially parallel to the glass substrate 2 are formed continuously over the part of the lead wires 7 going from the end electrodes 6 to the portion that bends upward.
  • These can be formed by a method in which they are cut out from a wide strip, or by a method in which flat copper wire is cut out.
  • the curving of the lead wires 7 in the above example is formed simply so as to create a state of being parallel to a direction perpendicular to the lengthwise direction of the lead wires 7.
  • the curved state of the lead wires 7 may be as shown in FIG. 6(a) , which is a state of being parallel to a direction that is inclined with respect to the lengthwise direction of the lead wires 7.
  • it may be an X-shaped pattern with respect to the lengthwise direction of the lead wires 7, or a state of being crossed in a + shape as shown in FIG. 6(c) .
  • a plurality of conical or quadrilateral dots facing in the up-and-down direction may be formed on flat lead wires 7.
  • a wide, thin strip of metal foil may be worked, such as stamping a copper foil with a width of 10.0 mm and a thickness of 0.05 mm.
  • the form of the lead wires may also be that of a mesh made of fine copper or aluminum wires.
  • Lead wires formed in this mesh shape will be similar to the above-mentioned lead wires formed with a curved shape in that they will be stretchable, so a solar cell module equipped with lead wires formed in a mesh shape will have the same operation and effect as the above-mentioned solar cell module 1A equipped with lead wires formed in a curved shape.
  • the lead wires 7 that are drawn out from the end electrodes 6 by curving in the up-and-down direction toward the center of the solar cell module 1A extend through the resin filling layer 4, and are embedded in the resin filling layer 4, but are not bonded onto the solar cells 3.
  • lead wires 7 that are drawn out from the end electrodes 6 toward the center of a solar cell module 1B may be bonded onto the solar cells 3. This affords a stronger structure of the solar cell module.
  • the solar cell module 1B equipped with the lead wires 7 that are bonded with an adhesive agent 8 onto the solar cells 3 has the following operation and effect. Specifically, even if a difference in the coefficients of thermal expansion between the glass substrate 2 and the lead wires 7 should cause the lead wires 7 to shrink, placing stress on the lead wires 7 bonded with the adhesive agent 8 onto the solar cells 3, these lead wires 7 are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires 7 from breaking in the middle, or the solar cells 3 from separating from the glass substrate 2.
  • these lead wires 7 are stretchable because they are formed in a curved shape as mentioned above, and this prevents the lead wires 7 from breaking in the middle, or the solar cells 3 from separating from the glass substrate 2.
  • the proximal ends of the lead wires 7 are connected to the end electrodes 6 formed at both ends of a serial connection in a state in which the solar cells 3 are serially connected.
  • proximal ends of the lead wires 7 are connected to is not limited to this, and intermediate electrodes that are similar to the end electrodes 6 may instead be provided between the serial connection in a state in which the solar cells 3 have been serially connected, and the proximal ends of the lead wires 7 may be connected to the intermediate electrodes.
  • FIG. 8 is a plan view of a solar cell module 1C according to a second embodiment as seen from the back side.
  • FIG. 9 is a cross section along the C-C line in FIG. 8 .
  • FIG. 10 is a cross section along the B-B line in FIG. 8 .
  • FIG. 11 is a cross section along the D-D line in FIG. 8 .
  • FIG. 12 is a detailed enlargement of the Y1 portion in FIG. 9 .
  • FIG. 13 is a detailed enlargement of the Y2 portion in FIG. 10 .
  • the solar cell module 1C of the second embodiment has substantially the same structure as the solar cell module 1A of the first embodiment above.
  • the solar cell module 1C of the second embodiment differs from the solar cell module 1A of the first embodiment above in the following respect.
  • the end electrodes 6 are formed in the lengthwise direction of the solar cell module 1A on the rear metal layer 13 of the left-end solar cell 3 connected to the transparent conductive film layer 11 of the adjacent solar cell 3 on the right side which is adjacent to the left-end solar cell 3, and on the rear metal layer 13 of the solar cell 3 at the right end.
  • lead wires 7 which are made of copper or aluminum foil and curved in the up-and-down direction, for example, are connected one each to these end electrodes 6. These lead wires 7 are drawn out from the end electrodes 6, along the glass substrate 2 through the resin filling layer 4, and toward the center of the cell module 1A.
  • the portion corresponding to the portion described above for the solar cell module 1A has the following structure.
  • the portion corresponding to the end electrodes 6 of the solar cell module 1A is made up of end bridge electrodes 61 and end leg electrodes 62, as shown in FIGS. 8 and 11 .
  • the end bridge electrodes 61 correspond to the extraction electrodes discussed above.
  • a plurality of end leg electrodes 62 are formed, spaced apart, on a line along the lengthwise direction of the solar cell module 1C, on the rear metal layer 13 of the left-end solar cell 3 connected to the transparent conductive film layer 11 of the right-side adjacent solar cell 3 that is adjacent to the left-end solar cell 3, and on the rear metal layer 13 of the right-end solar cell 3.
  • the end bridge electrodes 61 are formed so as to span the spaces between these end leg electrodes 62.
  • a strip of an insulating resin film forming layer 41 is formed between the solar cell 3 and the end bridge electrode 61 at the locations where the lead wires 7 are provided.
  • the strip of insulating resin film forming layer 41 is formed as shown in FIG. 11 on the back side of the solar cell 3 at the locations where the lead wires 7 are provided.
  • the above-mentioned end bridge electrode 61 spans this insulating resin film forming layer 41, and as shown in FIGS. 8 , 9 , 11 , and 12 , the proximal ends of the lead wires 7 formed curving in the up-and-down direction are connected to the end bridge electrodes 61 that span the insulating resin film forming layers 41.
  • the lead wires 7 formed curving in the up-and-down direction and connected at their proximal ends to the end bridge electrodes 61 are drawn out from the end bridge electrodes 61, along the insulating resin film forming layers 41, through the resin filling layer 4, and toward the center of the solar cell module 1C.
  • lead wires 7 bend upward at the center of the solar cell module 1C, and their distal ends protrude upward from the resin filling layer 4 and are housed inside the terminal box 9.
  • the shape inside the terminal box 9 is partially omitted.
  • the solar cell module 1C of the second embodiment above is the same as the solar cell module 1A of the first embodiment above in that the lead wires 7 are formed curving in the up-and-down direction. Accordingly, this solar cell module 1C has the same operation and effect as the solar cell module 1A of the first embodiment above.
  • the solar cell module 1C of the second embodiment above also has the following operation and effect.
  • the proximal ends of the lead wires 7 are connected to the end electrodes 6 formed on the rear metal layer 13 of the solar cells 3. Therefore, any stress exerted on the lead wires 7 is directly exerted on the end electrodes 6.
  • the proximal ends of the lead wires 7 are connected to the end bridge electrodes 61 that are formed spanning the spaces between the plurality of end leg electrodes 62 formed on the rear metal layer 13 of the solar cells 3 of the solar cell module 1C, as discussed above.
  • any stress exerted on the lead wires 7 is not directly exerted on the end leg electrodes 62 connected to the rear metal layer 13, and is instead exerted indirectly via the end bridge electrodes 61 formed so as to span the spaces between the end leg electrodes 62.
  • the following operation and effect are manifested when a difference in the coefficients of thermal expansion between the lead wires 7 and the glass substrate 2 of the solar cell module 1C causes the lead wires 7 to shrink, or when the glass substrate surface 2a of the solar cell module 1C is buffeted by a strong wind to the point that it bends and deforms so that it sticks out on the back side, which places stress on the proximal ends of the lead wires 7 connected to the end electrodes 6.
  • the curved shape of the lead wires 7 combines with a structure in which the proximal ends of the lead wires 7 are connected via the end bridge electrodes 61, rather than directly, to the end leg electrodes 62 connected to the rear metal layer 13, to further enhance the effect of preventing breakage at the proximal ends of the lead wires 7, or separation of the end bridge electrodes 61 from the rear metal layer 13 of the solar cell 3 as compared to the solar cell module 1A of the first embodiment.
  • the lead wires 7 are 2.0 mm wide, 0.08 mm thick, and 870 mm long, there is no stress relieving mechanism such as the undulations in Working Example 1, and the lead wire proximal ends are connected directly to the rear metal layer 13, a tensile force of 60 N or higher will be exerted on the connected parts at low temperature, but if they are connected to the rear metal layer 13 at the two end leg electrodes 62 that are separated from each other by 80 mm via the end bridge electrodes 61, then the force exerted on the connected parts will be only 8 N even though there is no stress relieving mechanism in the lead wires 7.
  • the shape may be undulations that continuously curve in the up-and-down direction, or may be any of the curved shapes, etc., described for the solar cell module 1A in the first embodiment above. This allows the tensile force exerted on the connected parts to be as low as 1 N or less.
  • the lead wires 7 that are drawn out so as to curve in the up-and-down direction from the end electrodes 6 toward the center of the solar cell module 1C extend through the resin filling layer 4 and are embedded in the resin filling layer 4, but are not bonded on the solar cells 3.
  • the lead wires 7 that are drawn out from the end electrodes 6 toward the center of the solar cell module 1C may be bonded to the insulating resin film forming layers 41 formed on the solar cell 3. This affords the same operation and effect as with the solar cell module 1B of the first embodiment above.
  • the proximal ends of the lead wires 7 are connected to the end bridge electrodes 61 formed at both ends of a serial connection in a state in which the solar cells 3 are connected in series.
  • proximal ends of the lead wires 7 are connected to is not limited to this. If intermediate leg electrodes and intermediate bridge electrodes that are the same as the end bridge electrodes 61 and the end leg electrodes 62 are provided intermediate of the serial connection in a state in which the solar cells 3 are connected in series, the proximal ends of the lead wires 7 may be connected to these intermediate bridge electrodes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)
EP10806482A 2009-08-07 2010-08-04 Solarzellenmodul Withdrawn EP2463918A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009185040 2009-08-07
PCT/JP2010/063176 WO2011016483A1 (ja) 2009-08-07 2010-08-04 太陽電池モジュール

Publications (1)

Publication Number Publication Date
EP2463918A1 true EP2463918A1 (de) 2012-06-13

Family

ID=43544378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10806482A Withdrawn EP2463918A1 (de) 2009-08-07 2010-08-04 Solarzellenmodul

Country Status (5)

Country Link
US (1) US20120132253A1 (de)
EP (1) EP2463918A1 (de)
JP (1) JPWO2011016483A1 (de)
CN (1) CN102473779A (de)
WO (1) WO2011016483A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2795678A1 (de) * 2011-12-20 2014-10-29 Saint-Gobain Glass France Solarmodul mit abdichtelement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102222680B1 (ko) * 2013-02-01 2021-03-03 엘지디스플레이 주식회사 플렉서블 디스플레이 기판, 플렉서블 유기 발광 표시 장치 및 플렉서블 유기 발광 표시 장치 제조 방법
US20150171788A1 (en) * 2013-12-16 2015-06-18 Gabriela Elena Bunea Solar module junction box bypass diode
DE102014010949A1 (de) * 2014-07-28 2016-01-28 Hpf Gmbh Verfahren und Anordnung zur Montage von Solarmodulen auf einer Grundfläche
CN107845691B (zh) * 2016-09-19 2020-10-16 浙江凯盈新材料有限公司 用于太阳能电池电极的涂覆有金属玻璃的材料
SG11201809794SA (en) 2016-12-20 2018-12-28 Zhejiang Kaiying New Materials Co Ltd Interdigitated back contact metal-insulator-semiconductor solar cell with printed oxide tunnel junctions
GB201709562D0 (en) * 2017-06-15 2017-08-02 Grafmarine Power distrubution and cell storage apparatus
US11456695B2 (en) 2020-01-20 2022-09-27 Erthos, Inc. Leading edge units device and methods

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3747096B2 (ja) * 1996-06-03 2006-02-22 株式会社カネカ 太陽電池モジュール及びその製造方法
JP2000068542A (ja) * 1998-08-26 2000-03-03 Sharp Corp 集積型薄膜太陽電池モジュール
JP3121811B1 (ja) * 1999-09-01 2001-01-09 鐘淵化学工業株式会社 薄膜太陽電池モジュール及びその製造方法
JP2004031646A (ja) * 2002-06-26 2004-01-29 Fuji Electric Holdings Co Ltd 太陽電池モジュール
JP4101606B2 (ja) * 2002-10-16 2008-06-18 三菱重工業株式会社 薄膜太陽電池モジュール
WO2005098969A1 (ja) * 2004-04-08 2005-10-20 Sharp Kabushiki Kaisha 太陽電池及び太陽電池モジュール
JP2006059991A (ja) * 2004-08-19 2006-03-02 Shin Etsu Handotai Co Ltd 太陽電池モジュール及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011016483A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2795678A1 (de) * 2011-12-20 2014-10-29 Saint-Gobain Glass France Solarmodul mit abdichtelement

Also Published As

Publication number Publication date
CN102473779A (zh) 2012-05-23
WO2011016483A1 (ja) 2011-02-10
US20120132253A1 (en) 2012-05-31
JPWO2011016483A1 (ja) 2013-01-10

Similar Documents

Publication Publication Date Title
EP2463918A1 (de) Solarzellenmodul
KR101679452B1 (ko) 태양 전지, 태양 전지 모듈 및 태양 전지 시스템
JP5687506B2 (ja) 太陽電池及び太陽電池モジュール
JP5874011B2 (ja) 太陽電池及び太陽電池モジュール
EP2426726A1 (de) Solarbatteriezelle
JP5879537B2 (ja) 太陽電池パネル、太陽電池モジュールおよび太陽電池モジュールの製造方法
JP5556146B2 (ja) 太陽電池モジュールの製造方法
US20120247530A1 (en) Strain relief solar cell electric coupler
EP3188256A1 (de) Solarmodul und solarmodulherstellungsverfahren
JP5903550B2 (ja) 太陽電池、太陽電池モジュール、太陽電池の製造方法
WO2014208312A1 (ja) 太陽電池モジュール及びその製造方法
JP2006310798A (ja) 太陽電池モジュール及びその製造方法
US20140202518A1 (en) Solar module
JP2001352089A (ja) 熱膨張歪み防止型太陽電池モジュール
JPWO2010021301A1 (ja) 太陽電池モジュール
US9196775B2 (en) Solar battery cell
US20190379321A1 (en) Solar roof tile connectors
US9373738B2 (en) Solar module
EP3188255B1 (de) Solarzellenmodul und verfahren zu dessen herstellung
JP5020179B2 (ja) 太陽電池モジュール
JP6249369B2 (ja) 太陽電池モジュールの配線材、太陽電池モジュール、及び太陽電池モジュールの製造方法
JP2015065303A (ja) 太陽電池モジュール及びその製造方法
EP2980859B1 (de) Solarzellenmodul
JP2013051339A (ja) 太陽電池モジュール及びその製造方法
JP6621029B2 (ja) 太陽電池モジュール

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120126

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20130627